As utilities fire up their"clean coal" machinesand international negotiators haggle over the precisedefinition of a tree , only one entity has the courage to stand and deliver the hot air the world so desperately craves on climate change: the U.S. Senate. After a hectic couple of weeks, filled with Republican walkouts and Democratic intransigence, the Senate's Environment and Public Works committee has pushed a bill to the Senate floor that would cut carbon dioxide. [More]